First, adjust the nose to recommended speed, the polishers should be in the best condition And can achieve the best polishing effect. First step: recommended speed:25000; According to different parts,you can choose 1, 2 and 3 different shape polishers for rough polishing the surface. Second step: recommended speed:15000-30000; According to different parts,you can Choose 4, 5 and 6 different shape polishers for fine Third step: recommended speed:10000-20000; According to different parts, you can Choose 7, 8 and 9 different shape polishers for super-fine